const varyColor = require('webpack-theme-color-replacer/client/varyColor');
const { generate } = require('@ant-design/colors');
const { ADMIN, ANTD } = require('../config/default');
const Config = require('../config');

const themeMode = ADMIN.theme.mode;

// 获取 ant design 色系
function getAntdColors(color, mode) {
  const options = mode && (mode === themeMode.NIGHT) ? { theme: 'dark' } : undefined;
  return generate(color, options);
}

// 获取功能性颜色
function getFunctionalColors(mode) {
  const options = mode && (mode === themeMode.NIGHT) ? { theme: 'dark' } : undefined;
  let { success, warning, error } = ANTD.primary;
  const { success: s1, warning: w1, error: e1 } = Config.theme;
  success = success && s1;
  warning = success && w1;
  error = success && e1;
  const successColors = generate(success, options);
  const warningColors = generate(warning, options);
  const errorColors = generate(error, options);
  return {
    success: successColors,
    warning: warningColors,
    error: errorColors
  };
}

// 获取菜单色系
function getMenuColors(color, mode) {
  if (mode === themeMode.NIGHT) {
    return ANTD.primary.night.menuColors;
  } else if (color === ANTD.primary.color) {
    return ANTD.primary.dark.menuColors;
  } else {
    return [varyColor.darken(color, 0.93), varyColor.darken(color, 0.83), varyColor.darken(color, 0.73)];
  }
}

// 获取主题模式切换色系
function getThemeToggleColors(color, mode) {
  // 主色系
  const mainColors = getAntdColors(color, mode);
  const primary = mainColors[5];
  // 辅助色系，因为 antd 目前没针对夜间模式设计，所以增加辅助色系以保证夜间模式的正常切换
  const subColors = getAntdColors(primary, themeMode.LIGHT);
  // 菜单色系
  const menuColors = getMenuColors(color, mode);
  // 内容色系（包含背景色、文字颜色等）
  const themeCfg = ANTD.theme[mode];
  let contentColors = Object.keys(themeCfg)
    .map(key => themeCfg[key])
    .map(color => isHex(color) ? color : toNum3(color).join(','));
  // 内容色去重
  contentColors = [...new Set(contentColors)];
  // rgb 格式的主题色
  const rgbColors = [toNum3(primary).join(',')];
  const functionalColors = getFunctionalColors(mode);
  return { primary, mainColors, subColors, menuColors, contentColors, rgbColors, functionalColors };
}

function toNum3(color) {
  if (isHex(color)) {
    return varyColor.toNum3(color);
  }
  let colorStr = '';
  if (isRgb(color)) {
    colorStr = color.slice(5, color.length);
  } else if (isRgba(color)) {
    colorStr = color.slice(6, color.lastIndexOf(','));
  }
  const rgb = colorStr.split(',');
  const r = parseInt(rgb[0]);
  const g = parseInt(rgb[1]);
  const b = parseInt(rgb[2]);
  return [r, g, b];
}

function isHex(color) {
  return color.length >= 4 && color[0] === '#';
}

function isRgb(color) {
  return color.length >= 10 && color.slice(0, 3) === 'rgb';
}

function isRgba(color) {
  return color.length >= 13 && color.slice(0, 4) === 'rgba';
}

module.exports = {
  isHex,
  isRgb,
  isRgba,
  toNum3,
  getAntdColors,
  getMenuColors,
  getThemeToggleColors,
  getFunctionalColors
};
